A portrait purporting to be of a living Lady Jane Grey, best-known from a post-death painting of her execution, has gone on display.

Experts believe they have uncovered enough evidence to suggest a Tudor-era portrait could be the only known image of Lady Jane Grey painted in her lifetime. She was "the nine days queen", whose brief reign was an unsuccessful bid by Protestants to prevent the accession of her Catholic cousin Mary I (1553 to 1558).

Mystery Solved? Is this the only portrait of tragic teen Queen Lady Jane Grey? - Compelling evidence that a 16th-century painting depicts Lady Jane Grey – the monarch executed in 1554 – in a stunning

Researchers may have found the only known portrait of Lady Jane Grey, which was defaced in an iconoclastic attack.

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We're replacing BBC Sounds outside the UK and bringing you BBC.com, a seamless way to read, watch, and listen - all in one place. Peter Moore, from Wrest Park, explains the significance of the discovery.